Mold for casting concrete poles and masts in upright position



Dec. 6, 1927. 1,651,776

R. MEEG-LARSSEN ET AL MOLD FOR CASTING CONCRETE PoLEs AND MAsTs 1N UPRIGHT PosITIoN Filed Jan.2 1925 only been possible. through. the Vbnfldii meeneem-Lenssen. or. teilweisen.

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Application le Sanitary 2, 1\To; 24S; and iirNorwayjJaniiary 14, v19 22 Onrfinvention .rentesV to an iinproyed moldforbnilding concrete masts and. poles in upright position. l

Such masts and poles at presentnsnally are. cast inhoriZonta-l position either-in a concretefcasting plant o1'h in thevicinity of A the 1 placeA of erection. lli/*hen ysnfliciently hardened :they aretransported to the place of erection,anderected, but y.as suchnnasts and, :poles are brittle, breakage [often occurs. They are also very heavy and consequently thecostsof transport and 'erection are consderable.v t Masts lorgpolesof great vlength or. for Agreat loads ,cannot be `built. yin this .wayowing .to

their excessive weigl1t,.,and snchmasts thereforerhave :to be, Cast=in .upright position .at .theplaceoferectiom brit hitherto this, has

'.np of `a complicated scaffolding,l Asuch scali'o'lding4 involving large costs, for nionntingldismantlin-g and Vtransport ,and also causing -Ya great waste in lumber. This tends to in crease. nndnly thecostsof ;s'nch masts or poles. l

The object of our invention is to .reduce such costs by using a method according to which is nsed a mold of snfflcientfrigidity to withstand the stresses caused by the casting process and the other stresses to which the poles are'exposed While still in a soft or semisoft state, simultaneonslyv providing, simple. but effective means for holding the mold in place in upright-position, such .means comprising a number of Abracing wir-es or struts, fastened to the mold inV suitable height above the base. In the following we will` describe our method with' reference to the accompanying drawing, showing in side view mast o1' poleof reinforced concrete under construe# tion.

In casting a reinforced concrete pole according to our method we use a continuous mold of an interior cross'section and form corresponding to the pole or mast to be cast, said mold having one of its sides composed of detachable wall sections or shutters.

In the executional form show-n in the drawing is used a mold, for a pole of rectangnlar cross section. rIhe two sides l of the mold consist of boards, nailed on to cross trees 2. rIhese cross trees 2 lare provided with holes for screw bolts 5. The third'side of the mold consists of boards 3', nailed together to form a continuousl moldysidewall which is placed 4b-ztwe'en the abovementioned two sides l ofthe moldv and`r are'kept in place byaidfof wedges t thatfare fdrivenjnj'be tween the boards. 3 and the yscrewbolts 5 interconnectingthe opposingtwo sides of the mold carrying-the cross trees 2i.: 'The fourth-side wall ofthe mold is built up of detachable sections ,or shatters .-6,v which are posi-tion las screw, bolts .zadjacent to it and `wedges 4 driven between -them and the said'inoldside 3.k so as to clamp this mold sidebetweenthe bolts and thefedges'v off-theftw'o v opposing mold. sides l, the threeinoldsides thns forme lng` trough-like.structure; In .this trough vis loosely placed the reinforcing element 7,

preferablyin Vpreviously interconnected state. Thereupon the fourth moldside, consisting of separate sections or shuttersl 6 is fastened in place, likewise by aid of wedges L driven in between the'adjacent screw bolts 5 and said sections. @ne or more of the .sa-idsec-A tions are, however, left openin order that the reii'iforcing element may be temporarily tied to the corresponding screw bolt 2, thereby holding it in place within the mold lduring the mold raising operation.`- In the :drawing the uppermostsection A6 is shown removed and the reinforcing element tied to the adjacent bolt 'by aid of a wire 8. `At the base end of the mold the part of the element 7 destined for forming the reinforcing ofthe base block to be cast into the cavity 9 is vleft sticking out. Across this base cavity'is laid a iioor lOhaving an opening corresponding tothe cross section of the mold at the base. t n

After these preparations the mold with the element 7 fastened within it is Vraised on the floor l0, with its lower opening registering with the openingfin the floor, and

with the'lower end of its reinforcing element depending into the base cavity 9, as

' shown inthe drawing. The fastening ofthe of bracing stays or struts 11, the lower end ot the mold With its cross pieces 1 fitting against the floor 10, so as to prevent the con-` crete from being `squeezed out between the base end of the mold andthe ioor. The floor or cover k10 may also be laid in place after the raising operation. e

When the casting is to begin the lowermost or' the sections or shutters 6 is removed by knocking its Wedges out, whereupon the casting vmaterial istilled. in until the base cavity 9 is filled, whereupon this section is again put into its place and the next shutter is removed and casting material is iilled in,

until the upper edge of the first named shutter is reached, and in this Way Wc proceed until the mold is completely filled.

Y This casting operation takes place Without the use of any soatiolding, the cross pieces 2 of the mold serving as steps for the casting operator. Separate steps may also be tastened to the mold, if necessary.

For transport lof the casting materials there may suitably be fastened a bracket l2 to the top end of the mold, carrying a block or sheave 13, provided With a hoisting rope 14.

It will be Vunderstood that the scope yof the invention is not limited to the particular executional form illustrated and described but comprises the use of any form ot mold arranged to be put together and hoisted into upright position and adapted to be subsequently lilled With casting material by aid of detachable mold sections orshutters. The

ing operation.

base may also be included inthe mold, in which case the mold is raised with its base resting on the bottom' of the base cavity. Or the base maybe cast beforehand, the mold being raised on top ofl it, and itsarmature being interconnected with that Within the mold rbefore the beginning of the cast- Instead of being made ot Wood as illustrated the mold parts may also be made of iron, or other metal, and `the fastening of the reinforcing element Within the mold may' be effected in any suit-able Way.

Claims: y n.

l. A mold for casting' concrete poles and masts in upright position, comprising, side Walls, cross members clamping the sidewalls together, clamping means intercoimeeting the cross members, one of the side Walls being composed oit a plurality ot detachable sections. d

2. A mold for casting concrete poles and mastsinV upright position, comprising, side Walls, cross members clamping the side `Walls together, clamping means interconnecting `the cross members, one of the side Walls being composed of a plurality of de-k tachable sections, the cross members being.,

fastened to vopposite side Walls, the' cross members being 'formed to constitute steps.

In testimony that We claim the foregoing as our invention, We have signed our names.

noLr MEEG-LARssEN. AAMUND BU. 

